One-pot enyne ring-closing metathesis–Diels–Alder reactions for the synthesis of polycyclic sulfamides
作者:Joseph T. Hill-Cousins、Sofia S. Salim、Youssef M. Bakar、Richard K. Bellingham、Mark E. Light、Richard C.D. Brown
DOI:10.1016/j.tet.2014.04.014
日期:2014.6
Ring-closingmetathesis (RCM) and sequential Yb(OTf)3 promoted Diels–Alder reactions of sulfamide-linkedenynes proceeded selectively in one-pot to afford a series of bicyclic and tricyclic sulfamides. Excellent levels of diastereoselectivity are observed for the cycloaddition step, with only the endo-adducts being isolated. The protocol was further extended to incorporate a one-pot RCM–cross metathesis